Aquarium tank



FIG. 1 is a top and right front perspective view of an aquarium tank, showing my new design;

FIG. 2 is another perspective view showing the cover in an open position;

FIG. 3 is a top and right front perspective view thereof, with a top front cover of the lid open;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is rear elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a right side elevational view thereof.

The bottom is plain and unornamental. 

The ornamental design for an aquarium, as shown and described. 